Originally Posted by
jet66
I'm really doubting the guy's story here. If you had a bullet lodged in the barrel, regardless of why it was stuck there, and fired another live round, I'd be more worried about having to replace other stuff than the barrel: The bolt, carrier, upper receiver, and possibly parts of your face and hands. I can't imagine that NOT causing a catastrophic 'kaboom!'
As for the rest, I think he is talking about 'bi-metal' jackets, where there is a very thin layer of copper (and not paint) over a steel bullet. I've not personally heard of this supposed barrel-clogging problem, other than the usual steel case debate and how exactly it fouls the chamber, when it comes to such ammo use. (and that indoor ranges don't allow steel-core or bi-metal rounds, too damaging to the back stops.) As far as I know, most bi-metal bullets are from companies like Wolf, Tula, Brown Bear, and the like. The AE 'black box' stuff is good, I've never heard of it being bi-metal, if that was in question. As far as the more technical details of 'steel case pros and cons,' do a search here on 'steel case ammo' and you will find pretty much everything you could ask about it. Personally, I've not had a problem shooting a ton of Wolf ammo through my rifles when it's all I've got, but I always do a good cleaning afterwards.